P.B.
It's great that you have that attitude about the situation. It seems so "possitive".
Maybe it would help to feel like home if you referred to each as "your home with Daddy" or "your home with me" or "your home [blank]" (fill in the town if they are different). This will be a good wording that will make it feel as a sense of OWNERSHIP.
Choose some toys, clothes, and other belongings that you can allow to stay at "his home with Dad".
Talk with your Ex about this and maybe he will help you out on his end.
I hope it helps.
Blessings,
P. <><